PSG-001 Polarization State Generator Module

Compact magneto-optic module that generates 6 states of polarization (−45°, 0°, 45°, 90°, RHC and LHC) under 6-bit TTL control.

Wavelength range: 1480 to 1620 nm
Wavelength range: 1260 to 1340nm
SOPs generated: 0°, ±45°, 90°, LHC, RHC
Insertion loss: 1.0 dB typical

Datasheet

Overview

The PSG-001 is a polarization state generator module that produces six states of polarization (SOP): −45°, 0°, 45°, 90°, right-hand circular (RHC) and left-hand circular (LHC). These correspond to the six pole points of the Poincaré sphere. The manufacturer lists the product as discontinued; the PSG 2000 and PSG-002/D High-Speed Polarization State Generators are named as alternatives.

The design is based on magneto-optic rotators, which allow the polarization states to be generated quickly and repeatably. The module can also be used for precise 90° polarization rotation.

The output state of polarization is selected with a 6-bit TTL signal, supplied from a microcontroller or a computer through a 10-pin digital port that also carries the +12 V supply. Its compact size makes it suitable for integration into test instruments or systems that use Mueller or Jones matrix measurements.

Typical uses include Mueller matrix-based measurements, polarization OTDR, performance monitoring and swept-frequency component measurement systems.

Key Features

Digitally switched SOP
Switching speed ≤250 µs
Repeatable SOP generation
0.1 degree SOP repeatability
6-bit TTL control
Compact module for OEM integration

Specifications

Optical

Wavelength range	1480 to 1620 nm Calibrated over 1500 to 1580 nm
Wavelength range	1260 to 1340nm
SOPs generated	0°, ±45°, 90°, LHC, RHC
Insertion loss	1.0 dB typical 1480 to 1620 nm version; values referenced without connectors
Insertion loss	1.2 dB typical 1260 to 1340 nm version; values referenced without connectors
Wavelength dependent loss	0.3 dB typical across C band 1480 to 1620 nm version
Wavelength dependent loss	< 0.3 dB 1260 to 1340 nm version
Maximum optical power	300 mW min.
Insertion loss variation	0.1 dB max. For all SOP states
Return loss	55 dB min.
Transient loss	0.6 dB per bit max.

Polarization

SOP repeatability	±0.1° on Poincaré sphere
Angle between SOPs	90±10° on Poincaré sphere
SOP switching speed	≤250µs Data sheet: 250 µs max.
Rotation angle wavelength dependence	−0.068 deg./ nm
Rotation angle temperature dependence	−0.1 deg./ °C